/Engine/Source/Runtime/GeometryCore/Public/DynamicMesh/InfoTypes.h
Information about mesh elements modified/removed by CollapseEdge()
struct FEdgeCollapseInfo
bool
bIsBoundary
int
CollapsedEdge
double
CollapseT
FIndex2i
KeptEdges
int
KeptVertex
FIndex2i
OpposingVerts
FIndex2i
RemovedEdges
FIndex2i
RemovedTris
int
RemovedVertex